Abstract: A method for producing isoprene includes culturing E. coli, which has isoprene productivity and in which a gene encoding a recA protein is attenuated or deleted, in a medium containing a carbon source. Therefore, a great amount of isoprene may be produced within a short period of time, and thereby considerably decreasing isoprene production unit costs.

Abstract: A method for producing isoprene includes culturing E. coli, which has isoprene productivity and in which a gene encoding a recA protein is attenuated or deleted, in a medium containing a carbon source. Therefore, a great amount of isoprene may be produced within a short period of time, and thereby considerably decreasing isoprene production unit costs.

Abstract: Method for detecting network attack based on time series model using the trend filtering. The method has the steps of: a) removing a trend component from the time series data to extract a residual component; and b) detecting an anomaly by applying a time series model to the residual component.

Abstract: Disclosed is a method for estimating an available bandwidth of a network link by transmitting small-sized probing packets using a time stamp function of an Internet control message protocol (ICMP) and using time information of the probing packet returned. According to the invention, even when the separate program or function is not activated in the router, it is possible to easily estimate and monitor the available bandwidth of the exterior network link connected to the network being managed. Accordingly, it is possible to operate the network more stably and to detect the abnormal sign of the network at early stage, thereby quickly coping with it. In addition, it is possible to prevent the excessive traffic or load from being caused in the network.